JP3011418U - Ink jet printing paper - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an ink jet printing paper capable of preventing stickiness, wrapping, and double feeding, and at the same time, preventing bleeding due to ink swelling and blurring during color printing. [Structure] A coating film 20 of an aqueous solution of a cationic polyvinyl alcohol containing 0.5% or more of fine particles of silica 21 of 0.01% by weight or more is formed on the surface of a polyester film 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a paper used in an ink jet printer.

[0002]

[Prior art]

 The conventional ink jet paper has a drawback that after printing, the stacked papers are easily sticky, and the paper is easily rolled up, and the printed ink swells and bleeds. In the case of a color image, there were drawbacks such as no edge and easy gradation. Further, there is a drawback that the sheets are overlapped at the time of printing.

[0003]

[Problems to be solved by the device]

 The present invention provides an ink jet printing paper capable of preventing stickiness, wrapping, and double feeding, as well as preventing bleeding due to ink swelling and blurring during color printing.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the ink jet printing paper of the present invention is a cationic polymer in which 0.01 wt% or more of 0.5 micron or more of silica 21 particles are contained on the surface of a polyester film 10 as shown in the figure. A film layer 20 of an aqueous solution of vinyl alcohol is formed.

In the present invention, the caustic polyvinyl alcohol has an excellent film forming ability from an aqueous solution, and strongly forms a transparent film to accelerate ink reception, prevent bleeding, and dry. The surface is not sticky even in high humidity because it is fast.

[0006] Silica is mixed with a cationic polyvinyl alcohol aqueous solution, and its particle size is preferably in the range of 4 to 6 microns for preventing stickiness and double feeding, and requires a light transmittance of 85% or more. The mixing ratio of the film is preferably 0.01% by weight or more and 0.08% by weight or less. However, up to 10% by weight may be added to the film which does not require light transmittance.

Further, the thickness of the silica-containing aqueous solution of the cationic polyvinyl alcohol aqueous solution is preferably in the range of 10 μm to 25 μm from the viewpoint of moisture absorption or water absorption, drying property after printing, curl property and cost. .

[0008]

First Embodiment FIG. 1 shows a first embodiment of the present invention.

The ink jet printing paper of this example has a surface of a polyester film 10 (polyethylene terephthalate film) having a thickness of 50 to 125 μm and a cationic polyvinyl alcohol (trade name: Gosef Eyemer K210 manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) 15 Wt% dissolved in 85 wt% of water at 80 ° C. to 90 ° C. and mixed with 0.06 wt% of silica 21 of 4 to 6 microns are applied, and the thickness of the coating layer 20 is 10 to 25 In addition, a matting agent composed of an unsaturated polyester resin-based or acrylic resin-based resin coat in which 0.05 to 30% by weight of silica 31 of 6 to 10 μm is mixed is applied to the back surface of the polyester film, and the coating layer 30 Had a thickness of 5 to 10 microns. This product had a light transmittance of 85%.

[0010]

Example 2 The same thickness as the coating layer 20B of the cationic polyvinyl alcohol aqueous solution containing silica 21B as in Example 1 on the surface of the polyester film 10B having the same material as in Example 1 and having a thickness of 38 to 50 microns. 21 to 30 microns, and a coating layer 40B of acrylic resin adhesive having a thickness of 20 micron is formed on the back surface. Further, a silicone layer is formed on the back surface of the adhesive coating layer 40B with a thickness of 38 to 75 microns. A polyester film 50B coated with a resin was adhered, and a matting agent coating layer 30B having the same thickness as in Example 1 was formed on the back surface thereof.

[0011]

[Effect of device]

 Therefore, when the paper of the present invention is printed by an ink jet type printer, the surface layer 20 or 20B has moisture absorption or water absorption, so that the printing does not bleed, and the color image has no edge loss or image gradation. This is avoided, and since the surface layer 20 or 20B contains the silica 21, the moisture absorption or the water absorption and the sticking or wrapping are prevented. Further, since the front surface layer 20 or 20B and the back surface layer 30 or 30B contain the silica 21, 21B, 31, 31B, double feeding at the time of printing is prevented.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing another embodiment of the present invention.

[Explanation of sign]

10 Polyester film 20,20B Cationic polyvinyl alcohol film layer 21,21B Silica

Claims (1)

[Scope of utility model registration request] 1. The surface of the polyester film 10,
An ink jet printing paper comprising a coating layer (20) of an aqueous solution of a cationic polyvinyl alcohol containing 0.5% or more of fine particles of silica (21) in an amount of 0.01% by weight or more.